private void btn添加退货申请单_Click(object sender, EventArgs e) { 产品退货申请单 form = new 产品退货申请单(mainform); form.Show(); if (dgv产品退货申请单.Rows.Count > 0) { dgv产品退货申请单.FirstDisplayedScrollingRowIndex = dgv产品退货申请单.Rows.Count - 1; } }